| astrologia | astrology |
| Astrologia chinesa | Chinese astrology |
| Astrologia e alquimia | Classical planets in Western alchemy |
| Astrolábio | Astrolabe |
| astrológico | astrological |
| astrometria | astrometry |
| astronauta | astronaut |
| astronauta soviética | cosmonaut |
| astronauta soviético | cosmonaut |
| astronave | spacecraft |
| astronomia | astronomy |
| astronomia de posição | astrometry |
| Astronomia extragaláctica | Extragalactic astronomy |
| astronomicamente | astronomically |
| Astronotus ocellatus | Oscar |
| astronáutica | astronautics |
| astronômico | astronomic |
| astroomia | star |
| Astrophytum | Astrophytum |
| Astroturfing | Astroturfing |
| Astrovirus | Astroviridae |
| Astrum Argentum | A∴A∴ |
| Astríaco | Austrian |
| Astrócito | Astrocyte |
| astróloga | astrologer |
